Answer: BExplanation:A multilayer switch (MLS) is a computer networking device that switches on OSI layer 2 like an ordinary network switch and provides extra functions on higher OSI layers.The major difference between the packet switching operation of a router and that of a Layer 3 switch is the physical implementation. In general-purpose routers, packet switching takes place using software that runs on a microprocessor, whereas a Layer 3 switch performs this using dedicated application-specific integrated circuit (ASIC) hardware.

QUESTION 18To directly connect the Ethernet network interface cards (NICs) of two computers, you should use a:

A. Crossover cableB. Straight cableC. Rollover cableD. Coaxial cable

Answer: AExplanation:An Ethernet crossover cable is a type of Ethernet cable used to connect computing devices together directly. Normal straight through cables were used to connect from a host network interface controller (a computer or similar device) to a network switch, hub or router.

Answer: BExplanation:A router is a device that forwards data packets along networks. A router is connected to at least two networks, commonly two LANs or WANs or a LAN and its ISP’s network. Routers are located at gateways, the places where two or more networks connect.

QUESTION 20If a router cannot determine the next hop for a packet, the router will:

A. Forward the packet to the default route.B. Send the packet back to the packet’s source.C. Broadcast the packet.D. Store the packet in the memory buffer.

Answer: AExplanation:If there is no next hop, the packets are not policy routed.A default route of a computer that is participating in computer networking is the packet forwarding rule (route) taking effect when no other route can be determined for a given Internet Protocol (IP) destination address.

QUESTION 21In which physical network topology is each computer connected to a central point?

A. StarB. MeshC. RingD. Bus

Answer: AExplanation:In local area networks with a star topology, each network host is connected to a central hub with a point-to- point connection.

QUESTION 22Which two of the following are connectivity options for wide area networks (WANs)? (Choose two.)